Automatic telecommunication systems





1. IN AN AUTOMATIC TELECOMMUNICATION EXCHANGE INCLUDING A PLURALITY OF LINES, A SWITCHING NETWORK CONNECTED THERETO, A PERMANENT MEMORY FOR STORING SEQUENCES OF ORDERS FOR CONTROLLING SAID NETWORK, AND COMMON CONTROL MEANS FOR RECEIVING ORDERS FROM SAID PERMANENT MEMORY, SAID SWITCHING NETWORK COMPRISING: ELECTRONIC SWITCHING EQUIPMENT INCLUDING STATIC ELECTRICAL CONNECTING DEVICES TO SET UP CONNECTIONS BETWEEN SAID LINES OF THE EXCHANGE, SAID LINES HAVING RESPECTIVE EQUIPMENT NUMBERS ASSIGNED THERETO CORRESPONDING TO THEIR RESPECTIVE TERMINATION LOCATIONS ON SAID CONNECTION DEVICES, WITH MULTI-DIGIT DIRECTORY NUMBERS ALSO ASSIGNED RESPECTIVELY TO SAID LINES AND HAVING NO FIXED RELATIONSHIP WITH RESPECT TO SAID RESPECTIVE EQUIPMENT NUMBERS, THE DEMAND FOR ANY SAID CONNECTION BEING SIGNALLED BY THE TRANSMISSION OVER ANY CALLING ONE OF ANY OF SAID LINES OF THE DIRECTORY NUMBER OF ANY CALLED ONE OF SAID LINES, MEANS ARRANGED TO RECEIVE ANY TRANSMITTED NUMBER AND INCLUDING FIRST ADJUSTABLE TRANSLATING MEANS ARRANGED TO TRANSLATE THE EXCHANGEDESIGNATING GROUP OF DIGITS OF A DIRECTORY NUMBERS INTO ROUTING DIGITS, MEANS RESPONSIVE TO SAID ROUTING DIGITS TO DIRECT CALLS TO THE RESPECTIVE CALLED EXCHANGE, SECOND ADJUSTABLE TRANSLATING MEANS ARRANGED TO TRANSLATE A PORTION THEREOF INTO THE SAID EQUIPMENT NUMBER OF THE CALLED LINE AND TO DELIVER THE TRANSLATED EQUIPMENT NUMBER TO SAID SWITCHING EQUIPMENT, AND MEANS INCLUDING SAID STATIC ELECTRICAL CONNECTION DEVICES IN SAID SWITCHING EQUIPMENT ARRANGED TO CONNECT THE CALLING LINE ELECTRONICALLY TO THE LINE HAVING SAID TRANSLATED EQUIPMENT NUMBER, WHEREBY ADJUSTMENT OF SAID TRANSLATING MEANS COMPENSATES FOR ROUTINE CHANGES OF THE IDENTITY OF, AND THE DIRECTORY NUMBER OF, A LINE CONNECTED TO ANY GIVEN SAID TERMINATION LOCATION. 